Sometimes circumstances prevent things been posted on social media. These things happen as do unforeseen problems.
Pretty disgusting to give a bad review for something more than likely out of their control.
I agree with the post above, make life less about you. The world doesn't revolve around you.
Oh come on.
This is, honestly, quite appalling. We are an online community and for members to be calling each other "disgusting" for leaving an honest review about their experience of an attraction, on an online site designed for precisely this type of thing, is down right out of order.
I'm sure there are plenty of people involved in voluntary organisations on this site and I have no doubt it comes with challenges - but you can't just say to potential customers "it's hard to organise volunteers" and then throw your toys out of the pram when they leave a bad review.
Life doesn't revolve around you, either.
If you advertise a product (in this case, quite a small and niche one), and expect people to come out of their way and give up their money - ultimately to sibsidise your hobby - you should deliver on it.
If we should all just bend to your whims, why not simply rely on donations and just run when you can?
To those criticising the review - if you were in the customers position, how would you review it?
Heck, what positives could you review? The location looked pleasant, shame the advertised service was not delivered and no communication was given?